EP1649148A1 - Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne - Google Patents

Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne

Info

Publication number
EP1649148A1
EP1649148A1 EP05766972A EP05766972A EP1649148A1 EP 1649148 A1 EP1649148 A1 EP 1649148A1 EP 05766972 A EP05766972 A EP 05766972A EP 05766972 A EP05766972 A EP 05766972A EP 1649148 A1 EP1649148 A1 EP 1649148A1
Authority
EP
European Patent Office
Prior art keywords
valve lift
control device
valve
cam
cam profiles
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP05766972A
Other languages
German (de)
English (en)
Other versions
EP1649148B1 (fr
Inventor
Martin Lechner
Hermann Hoffmann
Timothy Mark Lancefield
Ian Methley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mahle Ventiltrieb GmbH
Mechadyne PLC
Original Assignee
Mahle Ventiltrieb GmbH
Mechadyne PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mahle Ventiltrieb GmbH, Mechadyne PLC filed Critical Mahle Ventiltrieb GmbH
Publication of EP1649148A1 publication Critical patent/EP1649148A1/fr
Application granted granted Critical
Publication of EP1649148B1 publication Critical patent/EP1649148B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0047—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction the movement of the valves resulting from the sum of the simultaneous actions of at least two cams, the cams being independently variable in phase in respect of each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • Control device for a valve in particular a Gaswech ⁇ selventil an internal combustion engine
  • the invention relates to a control device for actuating at least one valve, in particular a Gas sweepingven- tiles an internal combustion engine, wherein the Ventilhubbewe ⁇ movement of the at least one valve by a superposition of at least two synchronously rotating, mechanically acting on a Hubbetuschistselement cam profiles, namely a first cam profile and a generated second cam profile and can be changed by phase shift between these two cam profiles.
  • hydraulically / mechanically operating combination devices from, for example, WO 00/31385 are known. With those devices, it is possible to produce various additional valve lift curves to a main valve lift curve.
  • This combined mechanical / hydraulic device has an extremely complicated structure with a large number of functional elements and a high susceptibility to interference associated therewith.
  • the invention is concerned with the problem of the control device according to the earlier mentioned patent application.
  • PCT / DE 2004/000079 to form a device with at least the possibilities of the mechanical / hydraulic control device according to WO 00/31385.
  • the device to be created according to the invention is intended to be used, for example, for the braking operation of a combustion engine of a motor vehicle as well as for a vehicle internal combustion engine for an internal engine charge by fresh air or exhaust gas or for displaying new combustion processes and for internal exhaust gas recirculation again the aforementioned internal combustion engines.
  • a valve control device must be able to generate certain additional valve lifts for a main valve lift with reference to a full revolution of a cam profile.
  • the invention is based on the general idea, in a control device in which the lifting movement of a valve is generated by a Hubbetuschistselement on the at least two synchronously rotating cam profiles ge together for a superposition of the cam profile curves einwir ⁇ ken, the cam profiles so with Profile curves to be superimposed on the lifting element with respect to its movement, such that each cam profile revolution, in addition to a main valve lifting curve determining the stroke movement, has additional valve lift curves of arbitrary shape and association with one another and opposite one another the main survey curve can be generated. It is thereby possible, starting from desired valve lift curves, to generate corresponding cam profile shapes by means of corresponding, conventional mathematical generation methods.
  • FIG. 2 shows two synchronously rotating cam profiles (part b, part c) intended for the common actuation of a lifting actuating element, with a depiction of the profile curves of these two cam profiles (part d) superimposed on the lifting actuating element Phase position Po and the valve lift curve that can be achieved by these cam profiles with respect to the valve lift movement, with a main valve lift curve (HV) and an additional valve lift curve (ZV) (part a),
  • HV main valve lift curve
  • ZV additional valve lift curve
  • FIG. 3 shows an identical illustration derived from FIG. 2 for phase-shifted cam signals. profile at a first phase shift by a value Pl,
  • FIG. 4 shows an identical illustration derived from FIG. 2 for mutually phase-shifted cam profiles during a second phase shift by a value P2, FIG.
  • FIGS. 2 to 4 are illustrations as in FIGS. 2 to 4 for an ⁇ dersartig shaped cam profiles with each shown in the same drawing under ⁇ different phase shift positions zwi ⁇ tween the two cam profiles,
  • FIG. 6 shows a depiction corresponding to FIG. 5 for differently shaped cam profiles
  • FIG. 7 shows a depiction corresponding to FIGS. 5, 6 for further different cam profile shapes.
  • Fig. 8 is a consistent with Figs. 5, 6 and 7 representation for further different cam profile shapes.
  • Valve control device Two synchronously rotating and mutually phase-adjustable camshaft having a first and second cam profile 1 and 2 actuate a designed as a lever with two contact rollers intermediate element in the form of Hubbet2011i ⁇ transmission element 4, which the resulting adjustment over a bearing axis on a power transmission lever 5 ü- transmits, the actuated via a lash adjuster 9 a valve.
  • the lever 5 is pressed against a stop 8 when the valve 6 is closed.
  • a spring 7 ensures that the Hubbetuschistselement 4 is always applied via a contact roller on the cam profile 1.
  • the phase angle of the two Nockenpro ⁇ file 1 and 2 is mutually variable.
  • valve movements achievable with the shapes of the cam profiles 1 and 2 shown in FIGS. 2 b and 2 c are explained on the basis of the illustrations in FIGS. 2 a to 4 a.
  • FIGS. 2b and 2c show the two synchronously rotating nose profiles 1 and 2 in cross section.
  • cam profiles 1, 2 have a basic shape for the generation of a valve stroke movement after a main valve lift curve and a superimposed shape for the Er ⁇ generation of an additional stroke movement after an additional valve lift curve.
  • These additional forms in the cam profiles 1 and 2 are shown in FIG. 2b in the first cam profile 1 with 1 'and in FIG. 2c in the second cam profile 2 with 2 'registered.
  • These two cam lobes 1 ', 2' are designed for a mutual superimposition with a resulting loading of the lifting actuating element 4 according to, for example, FIG. 1.
  • the profile curves of the cam profiles 1 and 2 are shown together for a cam profile revolution in FIG. 2d and correspondingly denoted by 1 and 2 in a phase position Po of the cam profiles as indicated in FIG. 2c.
  • FIGS. 3 and 4 each show a phase shift between the two cam profiles 1 and 2 by respectively one rotation of the second cam profile 2 relative to the first cam profile 1, specifically by the phase angle Pl in FIG and the phase angle P2 in FIG. 4, by means of which, according to the illustrations in FIGS. 3 and 4, different additional valve lift curves ZV are produced.
  • the phase adjustment between the two cam profiles 1 and 2 is here only by way of example by the rotation of the second cam profile 2 with respect to the first cam profile. 1 and of course can also be realized by Verdre ⁇ hung the first cam profile 1 relative to the second No ⁇ ckenprofil 2 or by rotation of both cam profiles in the same direction or in opposite directions by the same or gar Kunststoffli ⁇ che adjustment angle. Any further adjustment not mentioned here should be applicable to a control device according to the invention.
  • the main valve lift is generated by-in this example-the cam lift of the first cam profile 1 and the maximum stroke range of the cam profile 2.
  • the main valve lift is independent of the phase position of the second cam profile 2 in relation to the first cam profile 1.
  • the positive elevation 1 'of the first cam profile and the negatively inwardly directed recess 2' in the second cam profile 2 cancel each other by superposition, as can be seen from FIG. 3a.
  • cam profile shapes of the two cam profiles 1, 2 are shown in which, taking into account a total of three different phase positions of the two cam profiles 1, 2 to each other, the three valve lift curves shown in Fig. 5a result, that is, a main valve lift curve HV and two Additional valve lift curves ZV.
  • the profile curves of the cam profiles 1 and 2 in FIG. 5d result from the corresponding cam profile shapes from FIG. 5b and FIG. 5c.
  • FIGS. 6, 7 and 8 are constructed in the same way as the representation in FIG. 5 and differ from FIG. 5 only by different shapes of the cam profiles 1, 2 and resulting different valve lift curves in Fig. ⁇ a, 7a and Fig. 8a.
  • the type of generation of the valve lift curves by the two cam profiles 1, 2 described with reference to the examples according to FIGS. 6 and 8 is particularly advantageous. This means that in principle the increasing and decreasing cam profile areas of the two cam profiles 1 and 2 can be pulled up and in particular also intended to produce the main valve lift curve.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

L'objet de la présente invention est la mise au point d'une soupape, en particulier d'une soupape de renouvellement des gaz d'un moteur à combustion interne, dans laquelle un dispositif de commande permet, d'une manière mécaniquement simple, des mouvements de levée de la soupape avec des courbes de levée de la soupape qui se composent d'une courbe principale de levée de soupape dont le tracé peut être modifié et d'au moins une courbe de levée auxiliaire pouvant être modifiée. La position de phase entre les courbes de levée principale et auxiliaire peut également être modifiée. A cet effet, un dispositif de commande est destiné à actionner au moins une soupape, en particulier une soupape de renouvellement des gaz d'un moteur à combustion interne. Grâce à ce dispositif de commande, le mouvement de levée de la soupape (6) au moins est produit par une superposition de deux profils de came à rotation synchrone et agissant mécaniquement sur un élément d'actionnement (4) de levée, à savoir un premier profil (1) de came et un second profil (2) de came, et peut être modifié par décalage de phase entre ces deux profils (1, 2) de came. Les deux profils (1, 2) de came possèdent des zones spécialement formées dont la superposition peut produire au moins une levée (ZV) de soupape supplémentaire, en plus du mouvement principal de levée produit par les deux profils (1, 2) de came sur une rotation complète desdits profils (1, 2) de came. Cette courbe auxiliaire de levée (ZV) de soupape peut être modifiée pour ce qui est de sa forme et de son assujettissement à la courbe principale de levée (HV) de soupape par décalage de phase entre les deux profils (1, 2) de came.
EP05766972A 2004-07-17 2005-07-12 Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne Active EP1649148B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004034710 2004-07-17
PCT/DE2005/001218 WO2006007817A1 (fr) 2004-07-17 2005-07-12 Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP1649148A1 true EP1649148A1 (fr) 2006-04-26
EP1649148B1 EP1649148B1 (fr) 2006-12-13

Family

ID=35134440

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05766972A Active EP1649148B1 (fr) 2004-07-17 2005-07-12 Dispositif de commande pour une soupape, en particulier pour une soupape de renouvellement des gaz d'un moteur à combustion interne

Country Status (6)

Country Link
US (1) US7311072B2 (fr)
EP (1) EP1649148B1 (fr)
JP (1) JP2008506878A (fr)
CN (1) CN1839250B (fr)
DE (2) DE112005000030D2 (fr)
WO (1) WO2006007817A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447466A (en) * 2007-03-13 2008-09-17 Mechadyne Plc Variable valve system for an internal combustion engine

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DE102006021933A1 (de) * 2006-05-11 2007-11-15 Schaeffler Kg Schlepphebeltrieb in einem Zylinderkopf einer Brennkraftmaschine
GB2449096A (en) * 2007-05-10 2008-11-12 Mechadyne Plc Variable valve actuating system for i.c. engines
GB2456760B (en) 2008-01-22 2012-05-23 Mechadyne Plc Variable valve actuating mechanism with lift deactivation
CN101581238B (zh) * 2008-05-13 2013-07-17 麦加戴恩公共有限公司 用于内燃机的可变气门传动***
WO2010096437A2 (fr) 2009-02-17 2010-08-26 Cummins Inc. Appareil, système et procédé d'actionnement de soupapes variables
GB0920152D0 (en) * 2009-11-18 2009-12-30 Camcon Ltd Rotary electromagnetic actuator
US9765658B2 (en) 2011-03-02 2017-09-19 Delphi Technologies, Inc. Valve train system for an internal combustion engine
CN103422923B (zh) * 2013-08-27 2015-10-28 上海理工大学 具有柴油机废气再循环功能的双峰凸轮设计方法
DE102016201499B4 (de) * 2016-02-01 2021-03-11 Mtu Friedrichshafen Gmbh Ventiltrieb für eine Brennkraftmaschine, Brennkraftmaschine mit einem solchen Ventiltrieb, und Verfahren zum Betreiben eines Ventiltriebs
CN109804151B (zh) 2016-10-06 2022-03-29 沃尔沃卡车集团 内燃发动机和用于控制发动机的制动扭矩的方法
SE541865C2 (en) * 2017-03-22 2020-01-02 Scania Cv Ab Four-stroke internal combustion engine and thereto related vehicle and method
DE102017205034B4 (de) * 2017-03-24 2021-12-02 Mtu Friedrichshafen Gmbh Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine

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GB2447466A (en) * 2007-03-13 2008-09-17 Mechadyne Plc Variable valve system for an internal combustion engine
US7870841B2 (en) 2007-03-13 2011-01-18 Mechadyne Plc Variable valve actuation system for an internal combustion engine
GB2447466B (en) * 2007-03-13 2011-11-16 Mechadyne Plc Variable valve actuation system for an internal combustion engine

Also Published As

Publication number Publication date
US20070039577A1 (en) 2007-02-22
EP1649148B1 (fr) 2006-12-13
WO2006007817A1 (fr) 2006-01-26
DE502005000233D1 (de) 2007-01-25
JP2008506878A (ja) 2008-03-06
CN1839250A (zh) 2006-09-27
DE112005000030D2 (de) 2006-10-05
US7311072B2 (en) 2007-12-25
CN1839250B (zh) 2011-01-05

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